Sunan Ibn Majah, Book 23, Hadith 2842 (In-Book) ⓘ
It was narrated from Abu Umamah bin Sahl bin Hunaif that a man shot an arrow at another man and killed him, and he had no heir except a maternal uncle. Abu ‘Ubaidah bin Jarrah wrote to ‘Umar about that, and ‘Umar wrote back to him saying that the Prophet said: “Allah and His Messenger are the guardians of the one who has no guardian, and the maternal uncle is the heir of one who has no other heir.”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْحَارِثِ بْنِ عَيَّاشِ بْنِ أَبِي رَبِيعَةَ الزُّرَقِيِّ، عَنْ حَكِيمِ بْنِ حَكِيمِ بْنِ عَبَّادِ بْنِ حُنَيْفٍ الأَنْصَارِيِّ، عَنْ أَبِي أُمَامَةَ بْنِ سَهْلِ بْنِ حُنَيْفٍ، أَنَّ رَجُلاً، رَمَى رَجُلاً بِسَهْمٍ فَقَتَلَهُ وَلَيْسَ لَهُ وَارِثٌ إِلاَّ خَالٌ فَكَتَبَ فِي ذَلِكَ أَبُو عُبَيْدَةَ بْنُ الْجَرَّاحِ إِلَى عُمَرَ فَكَتَبَ إِلَيْهِ عُمَرُ أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ " اللَّهُ وَرَسُولُهُ مَوْلَى مَنْ لاَ مَوْلَى لَهُ وَالْخَالُ وَارِثُ مَنْ لاَ وَارِثَ لَهُ " .
also referenced under: Hadith 2737 (Reference) & Volume 4, Book 23, Hadith 2737 (DarusSalam)